ABAP Select data from SAP table Q3312 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q3312 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to Q3312. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the Q3312 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_Q3312 TYPE STANDARD TABLE OF Q3312,
      WA_Q3312 TYPE Q3312,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <Q3312> TYPE Q3312.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q3312.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q3312
  INTO TABLE IT_Q3312.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q3312
*  INTO TABLE @DATA(IT_Q33122).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_Q3312 INDEX 1 INTO DATA(WA_Q33122).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q3312 ASSIGNING <Q3312>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q3312>-OCPTX = 1.
<Q3312>-OHSTS = 1.
<Q3312>-INJTM = 1.
<Q3312>-INJPM = 1.
<Q3312>-HANDI = 1.

ENDLOOP.

LOOP AT IT_Q3312 INTO WA_Q3312.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q3312-DEATH, sy-vline,
  WA_Q3312-ALWT1, sy-vline,
  WA_Q3312-ALWT2, sy-vline,
  WA_Q3312-ALWT3, sy-vline,
  WA_Q3312-ALWT4, sy-vline,
  WA_Q3312-ALWT5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q3312 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_Q3312 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_Q3312 INTO WA_Q3312.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_Q3312_STR, 
OCPTX TYPE STRING,
OHSTS TYPE STRING,
INJTM TYPE STRING,
INJPM TYPE STRING,
HANDI TYPE STRING,
DEATH TYPE STRING,
ALWT1 TYPE STRING,
ALWT2 TYPE STRING,
ALWT3 TYPE STRING,
ALWT4 TYPE STRING,
ALWT5 TYPE STRING,
LUMRG TYPE STRING,
LUMOF TYPE STRING,
LGTXT TYPE STRING,
DISAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q3312_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_Q3312_STR-OCPTX sy-vline 
WA_Q3312_STR-OHSTS sy-vline 
WA_Q3312_STR-INJTM sy-vline 
WA_Q3312_STR-INJPM sy-vline 
WA_Q3312_STR-HANDI sy-vline 
WA_Q3312_STR-DEATH sy-vline 
WA_Q3312_STR-ALWT1 sy-vline 
WA_Q3312_STR-ALWT2 sy-vline 
WA_Q3312_STR-ALWT3 sy-vline 
WA_Q3312_STR-ALWT4 sy-vline 
WA_Q3312_STR-ALWT5 sy-vline 
WA_Q3312_STR-LUMRG sy-vline 
WA_Q3312_STR-LUMOF sy-vline 
WA_Q3312_STR-LGTXT sy-vline 
WA_Q3312_STR-DISAB sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.